class ActionView::Base

def set_output_buffer_with_haml(new_buffer)
  if is_haml?
    if Haml::Util.rails_xss_safe? && new_buffer.is_a?(ActiveSupport::SafeBuffer)
      new_buffer = String.new(new_buffer)
    end
    haml_buffer.buffer = new_buffer
  else
    set_output_buffer_without_haml new_buffer
  end
end